321325541721 has 12 divisors (see below), whose sum is σ = 484316758848. Its totient is φ = 204903243864.

The previous prime is 321325541717. The next prime is 321325541741. The reversal of 321325541721 is 127145523123.

321325541721 is a `hidden beast` number, since 3 + 2 + 1 + 32 + 554 + 1 + 72 + 1 = 666.

It is not a de Polignac number, because 321325541721 - 2² = 321325541717 is a prime.

It is a super-2 number, since 2×321325541721² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321325541741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 776148445 + ... + 776148858.

It is an arithmetic number, because the mean of its divisors is an integer number (40359729904).

Almost surely, 2^321325541721 is an apocalyptic number.

It is an amenable number.

321325541721 is a deficient number, since it is larger than the sum of its proper divisors (162991217127).

321325541721 is a wasteful number, since it uses less digits than its factorization.

321325541721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552297332 (or 1552297329 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The spelling of 321325541721 in words is "three hundred twenty-one billion, three hundred twenty-five million, five hundred forty-one thousand, seven hundred twenty-one".